Speed recording instrument



Aug. 31, 1937. E L GOLDSMITH 2,091,357.

SPEED RECORDING INSTRUMENT FiledJuly 29, 1932 4 Sheets-Sheet 1 Aug. 31,1937. E. 1.. GOLDSMITH 2.091357 SPEED RECORDING INS TRUMENT Filed July29, 1952 4 Sheets-sheaf, 2

6M @yW v 47-May Aug. 31, 1937. E. 1.. GOLDSMITH ,0 3

SPEED RECORDING INSTRUMENT Filed July 29, 1932 4 Sheets-Sheet 3 ZWZ KW1937- 5. L. GOLDSMITH 2,091,357

SPEED RECORDING INSTRUMENT Fi led July 29, 1932 4 Sheets-Sheet 4lnooooooooo'floooodec OI Patented Aug. 31, 1937 UNITED STATES PATENTOFFICE 8 Claims.

My invention relates more particularly to that type of recordinginstruments which may be employed for recording conditions attending thetravel of vehicles along a highway, and an object of my invention, amongothers, is the provision of an instrument of this type by means of whichnot only the number of vehicles passing along a certain section of thehighway may be determined but the speed of such vehicles will beautomatically denoted and each vehicle may also be positivelyidentified.

One form of a recording instrument embodying my invention and in theconstruction and use of which the objects herein set out, as well asothers, may be attained is illustrated in the accompanying drawings, inwhich- Figure 1 is a view in longitudinal section through a section of aroadway illustrating in a diagrammatical manner my improved apparatusinstalled relatively thereto, such apparatus being shown in section.

Figure 2 is a top view of the power unit.

Figure 3 is a view in elevation of the power unit with the motorremoved.

Figure 4 is a view in elevation of the power unit looking from the rightas shown in Figure 2 with a part of the motor broken off.

Figure 5 is a view in vertical section on a plane passing lengthwisethrough the axis of the actuating mechanism.

Figure 6 is a view in elevation looking from the left of the device asshown in Figure 3.

Figure '7 is a view in elevation of my improved apparatus embodying amodified construction, the recording frame being shown in verticalsection.

Figure Bis a view in section on a plane denoted by the dotted line 8-8of Figure 7.

Figure 9 is a top view illustrating another means for recording theconditions relating to travel.

Figure 10 is a view in elevation of the same looking from the right inthe illustration in Figure 9.

Figure 11 is a detail view in section on a plane denoted by the dottedline ll-Il of Figure 9.

Figure 12 is a diagrammatic view on reduced scale illustrating thewiring of the device just referred to, parts being broken oif forclearness of illustration.

Figure 13 is a diagrammatic view illustrating in simplified form theactual conditions as to a" portion of the wiring shown in Figure 12.

Figure 14 is a similar view relating to the wir- 1 ing shown in Figure1.

In the accompanying drawings the numeral l8 denotes a roadway havingpits l-l--I2 spaced a certain distance apart and with traps |3l4covering such pits, said traps being preferably hinged at one edge andwith the other edge adapted to be raised as by means of a spring asshown in Figure 1. A starting apparatus is located in the pit II, asshown at the left in Figurel, and a stopping or resetting apparatus islocated in the other pit I2, or that shown at the right in said Figurel. A starting switch lever l5 of insulating material is pivotallymounted on a support in the pit H and is connected by an actuating rod"5 with the trap l3 on one side of its pivot, its end on the oppositeside of said pivot having a contact adapted to slide into engagementwith a contact l1 on a movable terminal It also of insulating materialpivotally mounted on the support herelnbefore mentioned. The terminal I8 is held in contact with the end of the lever l5 as by means of aspring I! secured at one end to the terminal and at its opposite'end toan armature 28 of an electromagnet II also mounted on said support. Thelever I5 is spring pressed out of engagement with the contact I1. Thearmature 28 has a notch for engagement with one end of the switch leverl5 to hold the same in engagement with the contact ll until releasedtherefrom by electrical connections to be herelnafter described andoperated from the resetting mechanism in the pit l2. This resettingmechanism is similar in construction to the starting apparatus justdescribed and comprises in addition to the trap H a resetting switchlever 22 of insulating material having a contact thereon, actuator rod23, contact 24 on a pivoted terminal 25, and a spring 28, the magnetwith its armature being omitted. This resetting apparatus iselectrically connected with the starting apparatus and with other partsof the structure in a manner to be hereinafter described.

A power unit is electrically connected with the starting and resettingapparatus hereinbefore mentioned, this unit comprising a controllershaft 21 rotatably mounted in bearings 28 at the upper ends of posts 29rising from a base plate 38. A tubular "support is also mounted in theupper ends of said posts, as in ball bearings located in recesses insaid posts, as shown in Figure 5 of the drawings. This support comprisesa housing 3| for a sleeve 32 projecting from one end thereof with aplate 33 closing the chamber in the housing and having a hub received inone set of said ball bearings, the outer end of the sleeve 32 also beingsupported by another set of further and detailed description herein, butas shown in Figure 2 of the drawings.

An electromagnet 31 is secured within thehousing 3| to rotate therewithand the armature v 38 of said magnet is rigidly connected with the shaft21 as by means of a block secured to the shaft and on which saidarmature is supported, as shown in Figure 5 of the drawings.

An indicator arm or exhibiting member 39 is l5 operatively connectedwith the shaft 21, said arm being loosely mounted upon a block secured-to said shaft and held in frictional driving contact therewith by meansof a spring,. asshown in Figure 5. .The shaft is rotated backwardly asby means of a returning spring 40 having one end rigidly connected withthe shaft and the opposite end secured to a bearing 28. A supportingplate 4| is secured to the base plate 30 and conductor rings 42-43attached to an insulating plate 44 are supported by the plate 4|, abrush 45 being pivoted at the end of the arm 39 to movein contact withsaid rings.

The ring 42 is cut away as at 46, as shown in dotted lines in Figure 4,for a portion of its periphery, and the ring 43 has graduation marksbearing characters to denote speed. The arm 39 has a buffer plate 41 onthe opposite side of its axis from the brush 45, .said plate bearing aspring buffer 48 adapted to strike a stop 49 pro jecting from one of theposts 29, and as shown in Figures 3 and 4 of the drawings.

An insulating bushing 50 is mounted on the sleeve 32 said bushingsupporting conducting collars 5|52 from which conductors extend to 0 theopposite poles of the electromagnet 31. Brushes 53-54 extend frombinding posts 55-56 secured to one of the supporting posts 29, and astoward the disk as by means of a spring in a box 50 59. The brake leveris held in releasing position by means of a lug on an armature 6| of abrake operating magnet 62 mounted on the base 30 and as shown in Figure6 of the drawings. A camera or exhibiting device 63 is con- 55ventionally illustrated in Figure 1 of the drawings, it being understoodthat said camera will be placed in position to receive the image of avehicle passing along the road l0, said camera being electricallyconnected for operation in a 0 manner to be hereinafter described.

A battery 64 may be employed for supplying electric current to theseveral circuits. The starting circuit comprises wires denoted by theletter a extending from the positive pole of the 65 battery to thecontact I! and continued therefrom through the contact on the switchlever I5 [to the binding post 56 and from thence to the electromagnet31. The return wire of said circuit a is from said electromagnet to thebinding post 55 and from said post to the negative pole of the battery.

A resetting circuit comprising wires 0 extends from the battery alongthe circuit (1 including the terminal l8 and the. lever l5 to a pointbe- 'yond the latter, andfrom said point by a wire a manner that will bereadily understood without to a contact on the terminal 25, and fromsaid contact to a contact on the lever 22, when the latter is in circuitclosing position, and from thence to one pole of the resetting magnet2|, and from said magnet to the negative pole of the battery. A speedindicating circuit e employs 1 the circuit 0 from the battery to ajunction with the line 0 before its connection with the magnet 2|. Fromthis point the circuit e leads to a magnet 63' for operating the camera63 and from said magnet to and through the magnet 62, the conductor ring42, the brush 45, when connecting the ring 42 with the ring 43, and

from said ring 43 to a junction with the circuit c and thence to thenegative pole of the battery. In the operation of the device thus fardescribed, if a vehicle is traveling at a certain rate, say over thirtymiles. per hour, when said vehicle depresses thetrap 3 the lever l5 willbe swung into engagement with the contact I? thereby closing the circuita and will be held in this position by engagement with the armature 20.The magnet 31 being thereby excited its armature 38 will act as a clutchto connect the rotating housing 3| carrying the magnet 31 with thecontroller shaft 2'! thereby rotating the latter by the driving gear 34,and carrying with it the indicator or exhibiting arm 39 and the brush 45mounted thereon, it being understood that the magnet is beingcontinuously rotated by the action of the motor 35. With the apparatusarranged as illustrated herein the pits ||-|2 are located at suchdistance apart that if a vehicle be traveling over thirty miles per hourthe brush 45 will continue in contact with both of the rings 42-43thereby keeping the circuit closed at this point until after action ofthe trap l4.

When the vehicle depresses the trap M the resetting circuit c beingclosed by the lever 22 the current passes from the said lever along thereturn wire 0' to the magnet 2| and from said magnet to the negativepole of the battery. The

' magnet being energized the armature 20 is drawn from engagement withthe lever l5 and the latter assumes its normal condition to break thecircuit at this point.

The closing of the circuit by the lever 22 also establishes the circuite through the magnet 63' for the camera 63 effecting its operation totake a picture of the vehicle passing in front of it. This alsoenergizes the magnet 62 attracting its armature 6| and withdrawing thelug 60 from engagement with the brake lever' 58 and permitting thelatter to act under the influence of the spring in the box 59. Pressureof the lever against the brake disk 51 stops the operation of theindicating apparatus and the location of the brush 45 with respect tothe indicating marks on the index will denote the rate of travel of thevehicle.

vIt will be understood that the power unit may be located some distancefrom the traps |3|4, as alongside the roadway, and the apparatus thusfar described being arranged to denote speeds above thirty miles anhour, as soon as a vehicle has passed over the trap I4, an attendantwill reset the mechanism as by pulling down a cord 65 thereby releasingthe brake lever 58 from the brake disk 51 and permitting the lug 60 toengage the lever and hold it in unbraking position.

If a vehicle should stop between the two traps, or if such vehicleshould be traveling at a rate less than thirty miles an hour, noindication of speed will be made. The 0 ration of the trap l3 will startthe mechanism as hereinbefore described, but before the vehicle reachesthe trap l4, the brush 45 will have reached the cut away portion 46 ofthe conductor ring 42 so that the electric circuit will be broken atthis point. In this event the plate 44 continues its rotation until thearm 39 contacts with a circuit closer 66 thereby completing theresetting circuit comprising the wires e which is broken at the trap I4,such completion taking place through wires 2' constituting asupplemental resetting circuit, one of said wires 1' leading from thepositive side of the circuit to a terminal 61 and the other wire 1'leading from a terminal 68 to the opposite side of the circuit c. Saidterminals being pressed into contact the circuit is completed throughthe positive side of the circuit 0 to the wire 1', terminal 61, terminal68, wire i, to the negative side of the circuit 0, thence to theelectromagnet 2| and therethrough to the negative pole of the battery.This energizing of the magnet 2| resets the device as hereinbeforedescribed without a record having been made. In this operation it willbe noted that the camera 63 and brake operating magnet 52 will not beoperated owing to the fact that the circuit is broken at the rings 42and 43.

It is evident that the cut-away portion 46 of the ring or disk 42 may bereduced or elongated to determine the taking of a picture at differentspeeds, or the ring or disk 42 may be adjustable on its axis toaccomplish the same purpose and as shown by the slot and screw in Fig. 4of the drawings.

The structure shown in Figures '7 and 8 is, so far as the operatingmechanism is concerned, the same as hereinabove described. All that ischanged is the recording mechanism which is substituted for that,hereinbefore described, this recording mechanism being designed to :makea record of every vehicle passing along the roadway lll. The brakingmechanism is also omitted. A marking finger 69 is substituted for theindicator arm 39 said fingerbeing supplied with a marker 10 which mayHelp the form of a pencil or other marker. This marker operates inconnection with a chart I l passing as from a supply roll 12 over a feedroll 13 along a vertically disposed table 14 for supporting the chartduring recording operations, to a feed roll I5 and on to a receivingroll 16. The rolls 12 and 16 may be removably mounted as in the sideparts of a recording frame 11. The chart or strip 'll may be perforatedat its opposite edges to receive prongs from the rolls 13-15 to ensureeven movement of the chart. For operating the feeding mechastate thatthe shaft of the motor has a sprocket 80 carrying a sprocket chain 8|which passes around sprockets on the shafts of the roll and a feedingroll 82 for driving the roll 16 by frictional contact therewith. Asprocket chain 83 extends from a sprocket on the roll 15 around asprocket on the roll 13 for the purpose of driving the latter.

In place of the brush 45 described in connection with the device shownin Figures 1 to 6 a brush 84 is attached to the. buffer plate 41, beinginsulated therefrom and this brush connects contacts 85-86 projectingfrom a block on the base of the recording mechanism. These contacts havethe same function as the rings 42-43 in the other structure, saidcontacts being included in the circuit comprising the wires e, and asillustrated diagrammatically in Figure 8.

In the operation of this form of recording mechanism when the trap I3 isdepressed the operation of rotating theshaft 21 is the same as before,the electrical connections being the same. This swings the arm 69 towardthe'left, as seen in Figure 8, and the chart H being moved by the clockmechanism the time of operation of the arm 69 will be denoted.Thegraduations 8'! with the lines extending therefrom will denote thespeed of the vehicle, such speed being determined by the ends of thelines 88 made by the marker, the

movement of the arm 69 being stopped when the vehicle passes over thetrap 14, in the manner hereinbefore described with respect to the deviceof the other figures.

Should the vehicle be traveling at a rate less than that provided for bythe chart ll so that the finger 69 will reach the left hand edge of thechart before the vehicle passes the trap H, the base of the markingfinger 69 will strike the terminal 61 pressing it into contact with theterminal 68, thereby completing the circuit comprising the wires 2'hereinbefore described and operating the magnet 2| to release itsarmature from the lever l5, thereby resetting the mechanism ashereinbefore explained with respect to the other device.

It will be noted that the brake operatingmechanism 62 having beendispensed with in this latter mechanism the magnet for the camera 53 isconnected directly with the wire e (or c) extending from the levr 22.The mechanism just described will operate to take a picture by use ofthe camera only in case a vehicle is traveling at a prohibitive rate ofspeed which will be indi-' cated by'a termination of a line 88 beforereaching the crosswise center line 89 shown in Figure 8. In case,however, it is desired to take a picture of every vehicle moving alongthe roadway, as will frequently be the case, the contacts 85-}6 will belong enough not to be disengaged from the brush 84 during the completemovements of the marking finger 69. It will be understood that in actualconstruction the lines included in the index l9 and those included inthe index 81 will extend entirely across the sheet, intersecting eachother, in a manner common to charts of this class.

In Figures 9 to 12 inclusive I have shown an arrangement of therecording mechanism which I have found to be extremely eiiicient andwhich, I might say, is the preferred construction. The generalarrangement of the mechanism is the same as hereinbefore described, withthe exception that thestarting and, stopping apparatus is arranged inthe case containing the mechanism hereinbefore described and of whichthe base plate 30 comprises the back or bottom, said start ing andstopping apparatus being connected with the traps by wiring to behereinafter described, said traps actuating push buttons or similardevices located in the pits H and I2 to be actuated by said traps. Inthis form of the mechanism a reciprocating slide is employed in place ofthe reciprocating indicating arm 39 and marking finger 69 shown inconnection with the other devices.

'A pivotally mounted starting switch lever 90 is connected as by a linkwith an armature 92 of a starting magnet 93, which armature is springpressed away from the magnet, as shown in Figure 11. The magnet iselectrically connected in a manner to be hereinafter described with apush button or similar device 94 in the pit II, and the armature 92 isarranged to be held and released by the armature 20 of the resettingelectromagnet 2|, as in the device shown in Figure 1, the lever 90having one end bearing an insulated contact in sliding contact with thepivoted terminal I8 and the contact I! thereon, as in said Figure 1. Itwill be noted that in connection with this device I have applied thesame characters used in the device of Figure 1 to designate membersoperating substantially in the same manner and having substantially thesame functions as said members in Figure 1.

In the construction now being described the V speed recording apparatuscomprises a recording slide 90 reciprocatingly movable on slide rods 01projecting from an insulated block 98 secured to a U-shaped mount 99fitting over the top of and supported by a box I00 secured to a frameIOI rising from the base 30' and including a supporting plate I02 and abracket I03 projecting from the upper end of said .plate, and as shownin Figs. 9 and 10. The box I00 contains a motor in the form of a clockmechanism, which is of standard make. The mechanism is operativelyconnected with the driving shaft I04 of a timing set of rollerssupporting a timing and recording Y sheet I05 preferably having itsedges perforated I to receive spurs projecting from the driving roll tothe shaft 21.

(not shown) secured to the shaft I04. Said rollers and sheet being ofwell known construction and operation a further and detailed descriptionis omitted herein as their operation will be readily understood by thoseskilled in the art.

The outer ends of the rods 91 are loosely supported ininsulated'bushings in fixtures I06 rotatably supported upon a fixedshaft I01 secured in the bracket I03, said shaft acting as a pivotalmount for the rods 91 and parts supported thereon, so that the mount 99,the block 90 and the slide 96 with parts located thereon may'be liftedto permit ready change of sheets I05 when required. A post I08 securedto and rising from the slide 96 acts as an anchorage for one end of aflexible actuator I09 secured to the post as by means of a. clip and asshown in Figure 10 of the drawings, said actuator passing around aroller IIO, rotatably mounted on the shaft I01, and having its oppositeend secured to a disk I II fixed Another disk II2 secured to said shafthas another section II3 of said actuator secured thereto said sectionpassing upwardly and around a roller I I4 loosely mounted on the shaftI0'I. In order to enable the section II3 of the flexible actuator to begiven a quarter turn a block H5 is employed to. which the adjacent endsof the actuator are secured, and as shown in Figure 9 of the drawings.This enables the actuator to be passed around a roller IIB mounted on astud shaft rising from the mount 99 and as shown in Figure 10, this endof the actuator.

II3 being secured to-a clip fastened to a tubular post III rigidly fixedto the slide 96.

I The actuator I09 passes on to the disk III at I I l one side, as shownin Fig. 10, and the actuator II3 passes on to the disk H2 at theopposite side, the two actuators thus being wrapped in oppositedirections about the disks, so that one actuator is being wound on itsdiskwhile the other actuator is being unwound. The disks turning in thedirection indicated by the arrow in Fig. 10, the actuator I09 is woundupon the disk, exerting a pull on the slide 96 and at the same time theactuator H3 is unwound, thus yielding to permit movement of said slidetoward the right as viewed in Figs. 9 and 10. t a

A marker in the form of a prick point H8 is mounted for vertical slidingmovement in the tubular post I I1, said marker being spring pressedupwardly. Its upper end is engaged by an adjustable screw mounted in thearmature II9 of a recording magnet I secured to the slide 96, saidarmature being pivotally mounted in the upper end of the post I08, andas shown in Figure 10 of the drawings.

In the operation of the mechanism just described the shaft 2'! isrotated in one direction by the operation of the clutch in-the housing3| in the manner described with respect to the apparatusv shown in Figs.1 to 6, said clutch being released under certain conditionsand the shaft21 being returned to its normal position by means of the spring 40. Whenthe clutch is thrown into operation andthe shaft 21 is rotated the diskIII traveling in the direction of the arrow shown in Figure 10 will movethe carriage 06 and the parts carried thereby to the right along therods 91, the disk II2 permitting movement of the section I I3 of theactuator in one direction to allow such movement. The slide 96 will moveto an extent determined by the speed of the vehicle traveling along theroadway I0, and when the trap I4 is operated the clutch will be releasedin the manner hereinbefore described and the spring 40 will return theparts to the position shown in Figure 10. At the time of operation ofthe trap I4 the magnet I20 will be energized, in a manner to behereinafter described, the armature III! will be drawn to the magnet andthe prick point or marker IIB will punch the sheet I05 at the point freached by said marker at the timethe trap I4 is operated. The sheet I05will bemarked with graduations and lines as shown in Figure 8 so thatnot only the time will be recorded, but the speed of the vehicle willalso be recorded. These marks are omitted from Figure 10 of the drawingsas they will be sufliciently understood by the showing made in Figure 8.

A register I2I is supported on the 'base 30, as shown in Figure 10 ofthe drawings, this register comprising a counter of ordinary form andconstruction together with electrical means for operating it, said meanscomprising a core I22 and a coil I23 which operate actuating mechanismI24. This counter with the actuating mechanism including the electricalmeans is of the ordinary and standard make and may be purchased upon themarket, and therefore a. further and detailed description is omittedherein,

as the construction and operation will be readily understood by thoseskilled in the art.

The coil I23 for the registerand' the magnet I20 for actuating themarker II8 are included in the circuit e, as shown in Figures 12 and 13,the camera 03 with its switch comprising the rings 42-43, the registerI2I and the marker IIB being in multiple, as shown particularly inFigure 13, except in the arrangement shown in Figure 12 the wire fromthe camera to the negative pole of the battery is separate from thereturn wire from the register and marker to the battery. It

- will be noted that in the arrangement shown in Figure 12 the sliderods 91 constitute a part of the e circuit.

As hereinbefore explained the starting magnet 93 and its armature 92 aresubstituted for the rod l6 in Figure 1 as a means for actuating theswitch lever 96 which is the equivalent of the switch lever l5 shown inFigure 1, all of this mechanism in the device of Figures 9 to 13 beinglocated in the enclosing casing, as hereinbefore mentioned.

In order to initiate the starting operation of this latter form ofmechanism I employ an initiating circuit comprising wires-n extendingfrom the positive .pole of the battery through the push button 94 and tothe starting magnet 93, and through said magnet to a junction with thecircuit 0 as shown in Figure 12. This completes the n circuit to thenegative pole of the battery.

The motor 36 and the clock mechanism in the box I00 may be connectedwith a separate circuit I25 extending from any suitable source of power.

When arranged for operation the switches to the motor and the clockmechanism within the box I06 will be closed and said devices willtherefore be in operation, thereby rotating the housing II with partstherein and also moving the sheet I05. As to the other switches they areall open at the starting ofan operation. When the trap I3 is depressed,as by a vehicle passing over it, the switch comprising the push button94 is closed, thereby energizing'the magnet 93 through the circuit n.This operates'the armature 92, thereby swinging the switch lever 90 toclose the switch comprising the contacts I! and 95. This puts thecircuit a into operation to energize the magnet 31 and operates theclutch comprising the armature 36, as hereinbefore described to rotatethe shaft 21 and the disks II I and H2 secured thereto. The actuatorsbeing wound in opposite 40 directions upon said disks this operationeffects a pull upon the flexible actuator I09 and slackens the sectionH3 of said actuator, thereby moving the slide 96 and parts thereontoward the right as viewed in Figure 10 as hereinbefore set out, The

45 starting switch remains closed during this interval. This mechanismis reset by rotation of the shaft 21 to its position of rest by thespring 46, the actuators operating reversely to the manner aboveexplained.

50 When the trap H is depressed, as by the weight of a passing vehicle,the switch comprising the push button in the pit l2 will be closed,thereby establishing the c circuit and energizing the magnet H tooperate the armature 20 and release 55 the switch lever 90, therebyresetting the starting switch mechanism. The e circuit is alsoestablished simultaneously with the c circuit, thereby operating theregister or counter l2| to register the event of a passing vehicle. Thisestablishment of the e circuit also energizes the magnet I20, causingthe marker H8 to operate to perforate the sheet I05 at the point reachedby said marker in the movement of the slide 96.

If the vehicle is traveling fast enough the cam-- era will also beoperated at this time in the manner hereinbefore described with respectto the mechanism of Figures 1 to 6. If the vehicle be traveling not toexceed a certain speed the switch comprising the rings 62 and 43 will beopened,

70 thereby rendering. the camera inoperative, and

the switch 66 will be operated in the manner hereinbefore described toreset the mechanism.

This resetting operation will also take place in the event that thevehicle does not reach the second trap or otherwise fails to pass overit.

When the resetting magnet is operated as hereinbefore described, thecircuit a will be opened, thereby releasing the clutch 38 and the shaft21 will be returned to its normal position by the spring 46, and thiswill also effect a return of the slide 96 to its normal position readyfor a succeeding operation.

I claim:

1. A recording instrument including a rotatable support, a drive membermounted on said support and rotatable with respect to said support,means for coupling said support to said drive member, an exhibitingmember driven by said support, a control member biased to one positionand actuable to a second position, means effective to latch said controlmember in said second position upon such actuation, means responsive tosuch actuation for rendering the coupling means effective to couple thedrive member to the support, a stop means, and means responsive to op'eration of the stop means to release said latch means.

2. A recording instrument including a rotatable support, a drive membermounted on said support and rotatable with respect to said support,means for coupling said support to said drive member, an exhibitingmember driven by said support, a member biased to one position andactuable to a second position, means effective to latch said member insaid second position upon such actuation, means responsive to suchactuation for rendering the coupling means efiective to couple the drivemember and the support, a stop means, means responsive to operation ofsaid stop means to release said coupling means, and a movably mountedrecording sheet supported in cooperative relation with respect to saidexhibiting member.

3. A recording instrument including a movable support, a drive membermounted on said support and movable with respect to said support, meansfor coupling said support to said drive member, a slidably mountedrecording member operatively connected with said support, said recordingmember including a perforating device, an electric circuit including amember for operating said perforating device, means to controlcontinuity of said circuit, a movable starting control member, and meansfor operatively connecting said starting control member and saidcoupling means to effect operation of the latter to operatively connectsaid drive member and movable support.

4. A recording instrument including a movable support, a drive membermounted on said support and movable with respect to said support, meansfor coupling said support to said drive member, a slidably mountedexhibiting mechanism operatively connected with said support andincluding a perforating member and elect'romagnetic means for actuatingsaid perforating member, a plurality of interconnected electriccircuits, said magnetic means being connected in one of said circuitsfor operation by electrical current therein, means to control a break insaid circuits, said means including a movable starting control memberbiased to one position and actuable to a second position, meanseffective to latch said control member in said second position upon suchactuation, means for releasing said control member, means included inone of said circuits for electrically operatively connecting saidcontrol member and said coupling means and responsive to said actuationto couple the drive member to the support, and means for operating saidcontrol member.

5. In a recording instrument having a time driven chart and a marker,the combination of a rotatably mounted support carrying the marker, atime driven member rotatably'mounted on said support, electromagneticmeans operative to connect the support to the member, a circuit forenergizing said electromagnetic means, starting means operative to closesaid circuit, latching means operative to keep said starting means inclosed position, stopping means operative to release said latching meansand alternative means for unlatching said starting means operative bythe stylus support after said support has rotated to a predeterminedposition.

6. A recording instrument including a drive member, an exhibitingmember, an actuable start control means, means retaining said startcontrol means in actuated position, means for resetting said startcontrol means to unactuated position, means responsive to actuation ofsaid start control means for coupling the exhibiting member to the drivemember, an exhibiting device, electrical operating means for saidexhibiting device, a circuit for said operating means, means drivenconjointly .with the exhibiting member for conditioning the circuit tosaid operating means during a predetermined portion of the drive of theexhibiting device, stop control means, means magnetic clutch and anexhibiting structure drivable by said clutch when said clutch isenergized, a circuit for energizing said clutch completed upon actuationof said start control member, a stop control member, means for releasingsaid latch, and means responsive to actuation of said stop controlmember for actuating said latch release means.

8. A recording instrument as set forth in claim 7, wherein the startcontrol member includes a switch closed in the second position of thestart control member and wherein the stop control member includes aswitch closed when said stop control member is actuated, a pair ofconducting members, one of which is of a predetermined length,bridgingmeans for said conducting members driven by said exhibitingstructure, a camera, and camera operating means included in a circuitcontaining in series one of said conducting members, said bridgingmember, the other of said conducting members, said start control switchand said stop control switch.

EDWARD L'. GOLDSMITH.

